The tissues are sutured, fig. 39. The final prosthesis is cemented after healing, fig. 40, and a periapical radiograph is taken, fig. 41.

In extremely knife edge ridges, care must be taken in incising and reflecting the tissues, figs. 42, 43, 44. Even more care must be made in making the groove, being careful not to perforate the lingual or buccal plate of bone, figs. 45, 46.

The insertion and tapping of the blade is extremely important and must be done with tender care to prevent fracturing the bone flanking the groove, figs. 47, 48, 49, 50, 51, 52, 53. An x-ray is taken, fig. 54. The tissues are sutured closed, fig. 55.

154